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Details for Benchmark: PU2312

N 44° 05.811 W 103° 25.576 (NAD 83)

Altitude: 4987

Coordinates may not be exact. Altitude is SCALED and location is ADJUSTED. (more info)

Location:
In PENNINGTON county, SD View Original Datasheet
Designation:
NORRIS
Marker Type:
triangulation station disk
Setting:
setting not listed - see description
Stability:

Reference Points

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Found while geocaching and finding the nearby cache. Marker in pretty good condition. Was unable to find the other one.

[Photos:]
photoNorris Peak Benchmark

Only found one, a little beat up.

[Photos:]
photoNorris Peak PU2312 11Sep10

went back up for a third time to get the pictures

[Photos:]
photoNorris peak #2
photoNorris Peak
photoThe tower base

Found the benchmark after a long hike to the peak. The gate was closed and hiked in off a logging road from 2.1 miles as the crow flies. Didn't know there was 2 other benchmarks in the area but will make it back to check it out again.

[Photos:]
photoNorris Peak NGS

Found all 3, in various conditions

[Photos:]
photoNorris BM
photoNorris #1
photoNorris #2

Came back up when we realized there were three benchmarks to find (we only found the one marked No. 1 when we came up 2 days ago to find the cache).

[Photos:]
photo06-07-25NorrisPeakMarker.jpg

Found these 3 benchmarks while doing the Norris Peak Cache

Windy day on top of Norris Peak, even a little snow.

Found azimuth and the 2 reference markers.

[Photos:]
photoPU2312 - NORRIS - Azimuth
photoPU2312 - NORRIS - Reference No. 1
photoPU2312 - NORRIS - Reference No. 2

Accidentally stumbled on this while searching for the Norris Peak geocache.

Documented History (by the NGS)

1/1/1950 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1950 (VRS) STATION IS LOCATED ON THE SUMMIT OF NORRIS PEAK IN THE BLACK HILLS NATIONAL FOREST, ABOUT 10 MILES WEST AND 2 MILES NORTH OF RAPID CITY, AND 51 FEET NORTHEAST OF THE NORTHEAST CORNER OF LOG HOUSE. STATION MARK PROJECTS 2 INCHES, AND THE DISK IS STAMPED NORRIS 1950. REFERENCE MARK NO. 1 IS 25 FEET EAST OF THE SOUTHEAST CORNER OF LOG HOUSE. THE MARK PROJECTS 3 INCHES, AND THE DISK IS STAMPED NORRIS NO 1 1950. REFERENCE MARK NO. 2 IS 26 FEET NORTH OF THE NORTHWEST CORNER OF A LOG HOUSE. THE MARK PROJECTS 2 INCHES, AND THE DISK IS STAMPED NORRIS NO 2 1950. STATION MARK IS A STANDARD DISK WELDED ON THE TOP OF A 2-INCH IRON PIPE. REFERENCE MARKS ARE STANDARD DISKS SET IN OUTCROPPING BEDROCK. THERE WAS NO POINT VISIBLE FROM THE GROUND AT WHICH AN AZIMUTH MARK COULD BE ESTABLISHED. HEIGHT OF LIGHT ABOVE STATION MARK 14 METERS.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1998.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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